I suspect the fish issue is that many kinds of fish are really not very interactive or inquisitive. Many will hide when the big human comes to look at them. But that just isn't the case with bettas! They seem to have a very active curiosity and interest in what's going on outside their tanks, moreso than almost every other breed in the pet store.
The Boy Feesh: Indigo CT, Lavatail CT, Ghost CT, Chicory HM, Redfish VT, Magic DT
The Girl Feesh: Christmas CT, Shine VT, Snowflake CT, Stripes VT, Midnight CT, Grif VT, Tangerine VT, Wraith CT, Amethyst VT, Ice CT, Poe CT, Turquoise II CT